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稠油热采方法是相当复杂的,针对这种方法研究了一种非结构网格并行全隐式模拟器。该模拟器的重点是模拟注蒸汽和蒸汽辅助重力泄油的物理过程,以及用并行算法有效模拟这类方法。该模拟器利用牛顿-拉夫逊方法求解组分物质平衡方程、能量平衡方程和质量守恒方程,得到了组分摩尔分数、饱和度、温度和压力。外部热源和热汇包含在源汇项中,用来模拟上覆岩石和下伏岩石之间的能量交换。同时,还讨论了求解过程以及相变处理方式中如何实现稳定的非线性迭代。利用第4个SPE对比算例中的例子验证了此模拟器,同时,也证实了该模拟器具有良好的性能和并行可扩展性。
The method of heavy oil thermal recovery is quite complicated. A non-structural grid parallel total implicit simulator is studied for this method. The simulator focuses on the physical processes that simulate steam injection and steam-assisted gravity drainage, and uses parallel algorithms to effectively simulate such methods. The simulator uses the Newton-Raphson method to solve the component balance equation, the energy balance equation and the mass conservation equation, and obtains the mole fraction, saturation, temperature and pressure of the components. External heat and heat sinks are included in the source and sink section to simulate the energy exchange between the overlying rock and the underlying rock. At the same time, it also discusses how to achieve stable non-linear iteration in solving process and phase change treatment. This simulator was validated by the example of the 4th SPE comparison example. At the same time, this simulator was proved to have good performance and parallel scalability.